00289nam 2202805 45000010005000000030023000050050009000280080041000370820012000781000029000902600000001192450050001192805StarLibrary Marc Built20180417201711 ||||| |||||||||||amh  a423.173 aJohn P.Judd and Scadding aJOURNAL OF ECONMMIC LITERATURE septemper 1993